40261945 has 4 divisors (see below), whose sum is σ = 48314340. Its totient is φ = 32209552.

The previous prime is 40261943. The next prime is 40261999. The reversal of 40261945 is 54916204.

40261945 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 27793984 + 12467961 = 5272^2 + 3531^2 .

It is a cyclic number.

It is not a de Polignac number, because 40261945 - 2¹ = 40261943 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40261943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4026190 + ... + 4026199.

It is an arithmetic number, because the mean of its divisors is an integer number (12078585).

Almost surely, 2^40261945 is an apocalyptic number.

It is an amenable number.

40261945 is a deficient number, since it is larger than the sum of its proper divisors (8052395).

40261945 is an equidigital number, since it uses as much as digits as its factorization.

40261945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8052394.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 40261945 is about 6345.2300982707. The cubic root of 40261945 is about 342.7400983995.

The spelling of 40261945 in words is "forty million, two hundred sixty-one thousand, nine hundred forty-five".